<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <script src="http://d3js.org/d3.v3.min.js"></script>
    <div id="header">
        <p>Is this a circle?</p>
    </div>

    <svg width="500px" height="40px">
        <circle cx="50" cy="20" r="20"></circle>
    </svg>

    <div class="footer">
        <p>Yeah,looks like it</p>
    </div>
</body>
</html>